Re: Rhino track failier?
 

No, we are not going to offer aluminum versions of this pulley.

We strongly believe that our Rev4 pulley is very strong and will handle the application well. We have ran our first tests today using these pulleys and beat up our test mule like crazy. We will post a video shortly.

We are now running production of the Rev4 pulley and will have them available to ship out early next week (2/15-2/17).

Sincerely,
Andy B.

Re: Rhino track failier?
 

Here is a video showing the testing we have done to the Rhino Track Drive drive base during the past two days. The first half of the video is with the old pulleys (Rev3). The second half of the video used the new pulleys (Rev4).

The pulleys, both Rev3 and Rev4 held up very well during these tests. The only break we had was on a Rev3 pulley after the 2.5 foot drop during the first portion of the video.

Andy B.

Re: Rhino track failier?
 

Thanks Andy for doing all this testing and communicating with all of us on CD. It was interesting seeing how you did your testing and the level that you went to in doing bad things to the Rhino track. This kind of public transparency is really amazing.

The ultimate survival test would be to take the battery and cRio off and put the mule into a cardboard box and ship it via UPS to the East or West Coasts. :rolleyes:

(UPS does a great job on packages under 30 lbs, but anything heavier, like the mule is problematic. I've received my fair share of heavy damaged stuff via UPS)

Re: Rhino track failier?
 

We just received a box of Rev4 pulleys. The parts are still slightly hot, as they literally just came off of the mold machine.

If you have sent us an email claiming cracked or fractured pulleys, then we are sending Rev4 replacements out today via Ground delivery. If you have sent us an email wanting replacements but don't have cracked Rev3 pulleys, then we are shipping those out on Monday.

Andy B.

Re: Rhino track failier?
 

Andy,

This is awesome! I love that FRC Suppliers solve problems like FRC Teams. Quick iteration and quick implementation!

I may have missed it from earlier in the thread, but have you emailed all the teams that ordered Rhino tracks with Rev 3 pulleys? I just ask because I'm sure there will be teams that ordered the Rhino system without realizing a cracked pulley until it's too late (aka at competition). These are the types of teams that wouldn't be checking CD or Lunch with Andy (which I watch religiously!)

Thanks for all your work on this and keeping all of FRC "rolling"!

-Mike

Re: Rhino track failier?
 

Andy, you guys are quite simply the best. Your customer service is second to none anywhere anytime. Thank you for everything you do for the entire FIRST community.

Re: Rhino track failier?
 

PSA: Rev4 pulleys appear to now be available for purchase on AM.

http://www.andymark.com/product-p/am-3298a.htm

Re: Rhino track failier?
 

Looking for the torque to review how we installed our pulleys - can't find on the web site, can someone advise?

Re: Rhino track failier?
 

Here's pictures of the original hubs that we filled with epoxy..these will get us through until our Rev4's arrive. We had a large number of our original hubs fail, so we epoxied the unbroken and broken ones. So far, so good, but we've not yet got a ton of drive time on these. The epoxy surface looks kind of ragged, but its working. The hubs, including bearing and epoxy now weigh 9.6 ounces each.

A fun bump for this thread
Attachment 20272

Re: Rhino track failier?
 

Ours failed during quals (match 4) in San Diego...luckily I had the team order the revised pully's and we made it on time for our next match. The middle one is the one that disintegrated.